Personally, i admire those who had that, and gave it up to raise children.
Why? :shrug: Not having kids doesn't actually hurt anyone.
But what's so admirable about giving up a great life and career to make new babies?
There's lots of reasons. Sometimes accidents too (:P ). Fulfilment, settling down, or what have you. Part of it may even be the simple rhythm of life. Children depend upon parents, then grow into young advlts who dash out into the world and do crazy reckless things, who then get married and have children of their own, and end up becoming the parents themselves upon who the new child relies.
The thing about having kids, and I think everybody understands this on some level whether they're aware of it or not, is that children cause an immense psychological change in their parents. As soon as you have a child your entire world view and identity changes.
Not only that, but you suddenly have something in common with billions of other people. Suddenly you're not Zeno, or turns-the-page, or Steampunk...you're a
Dad (or
Mom as the case may be). Infact it might be said that "bad" parents are the ones who don't really change at all when they have children. Which isn't to say everything ends fullstop. You don't lose parts of yourself when you become a parent, but just end up adding some very new, very big parts.